Massage roller



FIG. 1 is a perspective view of a massage roller showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left elevation view thereof; and,

FIG. 7 is a right elevation view thereof.

The broken lines depicting portions of the massage roller shown in the figures are for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a massage roller, as shown and described. 